109781613 has 12 divisors (see below), whose sum is σ = 161947968. Its totient is φ = 71630280.

The previous prime is 109781611. The next prime is 109781653. The reversal of 109781613 is 316187901.

It is not a de Polignac number, because 109781613 - 2¹ = 109781611 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109781611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 129343 + ... + 130188.

It is an arithmetic number, because the mean of its divisors is an integer number (13495664).

Almost surely, 2^109781613 is an apocalyptic number.

It is an amenable number.

109781613 is a deficient number, since it is larger than the sum of its proper divisors (52166355).

109781613 is a wasteful number, since it uses less digits than its factorization.

109781613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259584 (or 259581 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 109781613 is about 10477.6721174123. The cubic root of 109781613 is about 478.8246896312.

The spelling of 109781613 in words is "one hundred nine million, seven hundred eighty-one thousand, six hundred thirteen".